<?php
class Tv {
    public function open()
    {
        echo "打开爆米花机<br>";
    }
    public function run() {
        echo "开始爆米花机<br>";
    }
    public function unRun() {
        echo "停止爆米花机<br>";
    }
    public function close() {
        echo "关闭爆米花机<br>";
    }
}